Filters: Tags: Alaska Range (X) > Extensions: Citation (X)
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Berry availability and quality may be factors driving grizzly bear population dynamics on the north flank of the Alaska Range. Fall nutritional status is largely dependent on berry availability. The primary berry food sources in the study are blueberry, crowberry, and soapberry. Aerial surveys were conducted to assess distribution patterns of the berries and to select areas for establishing monitoring transects. Cover of berry-producing species and actual number of berries, etc., were determined. Berry samples were analyzed for total nitrogen and stable nitrogen isotope ratios. Seeds were analyzed separately.
We examined the spatial distributions of Alaskan freshwater fishes using 2 frameworks, ecoregions and hydroregions (catchments). Ecoregions are defined by climate, terrain, vegetation, and soils; their utility in explaining distributions of aquatic organisms is based upon terrestrial-aquatic linkages. Analysis of the probable dispersal of aquatic organisms along past and current hydroregions provides an alternative and likely complementary path to understanding distributions of aquatic organisms. We use published distribution records for freshwater fishes of Alaska to construct a matrix of presence/absence records for each fish species in ecoregions and hydroregions of Alaska. We assessed faunal similarities among...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Alaska Range,
Brooks Range,
M1-Fish
Categories: Publication;
Types: Citation;
Tags: A1-US Parks,
Alaska Range,
Wrangell-St. Elias National Park and Preserve
Abstract: We examine long-term streamflow and mass balance data from two Alaskan glaciers located in climatically distinct basins: Gulkana Glacier, a continental glacier located in the Alaska Range, and Wolverine Glacier, a maritime glacier located in the Kenai Mountains. Over the 1966–2011 study interval, both glaciers lost mass, primarily as a result of summer warming, and streamflow increased in both basins. We estimate total glacier runoff via summer mass balance and quantify the fraction of runoff related to annual mass imbalances. In both climates, annual (net) mass balance contributes, on average, less than 20 % of total streamflow, substantially less than the fraction related to summer mass loss (>50 %),...
Categories: Publication;
Types: Citation;
Tags: Alaska CASC,
Alaska Range,
Forests,
Glaciers and Permafrost,
Gulkana Glacier,
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